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Physics questions with answers

2,629 multiple-choice questions. Open any question for its answer and explanation.

Questions asked in State PSC and UPSC prelims, by topic. Each topic also has notes to read.

Read the notes: Conductivity →

  1. An n-type semiconductor isAsked in WBCS Main Paper 4 2023
  2. When a small amount of a suitable impurity is added to the pure elemental semiconductor, the conductivity of the semiconductor is increased manifold. Such materials are known as - - (5) Question not attemptedAsked in Protection Officer 2024
  3. Which of the following liquids is a bad conductor of electricity?Asked in BPSC Prelims Exam 69th
  4. are materials whose resistivities become zero below a critical temperature.Asked in MPSC CS Prelims 2023
  5. Superconductors are substances whichAsked in WBPSC CS Prelims 2020
  6. Which of the following super conducting material has the highest critical temperature and highest critical magnetic flux density?Asked in WBCS Main Paper 4 2022
  7. On heating, the resistance of a semiconductorAsked in BPSC Prelims Exam 66th UPPSC Upper Mains 2015
  8. Silicon is one of the best known semi conducting material. As its temperature rises more, it becomes a better conductor. But the temperature at which the silicon gets permanently damaged isAsked in TNPSC CS Prelims 2021
  9. With increase in temperature the resistance of a pure semiconductorAsked in WBPSC CS Prelims 2016
  10. Electrical resistivity of a conductorAsked in WBCS Main Paper 4 2022
  11. The positive temperature coefficient of resistance is forAsked in WBCS Main Paper 4 2023
  12. The poorest conductor of heat among the following isAsked in BPSC Prelims Exam 66th
  13. Which one of the following pairs of metals are very good conductors of heat ?Asked in UPSC CDS 2 2022
  14. Which among the following has the least thermal conductivity?Asked in OPSC CS Prelims 2023
  15. In terms of thermal conductivity (k) and electrical conductivity (δ), diamond hasAsked in WBPSC CS Prelims 2021
  16. Consider the following statements: Assertion (A): If Ice collects on the freeze the cooling in the refrigerator is affected adversely. Reason (R) : Ice is a poor conductor. Select the correct answer using the codes given below: Codes:Asked in UPPCS Prelims 2010
  17. Which one among the following statements about thermal conductivity is correct? [A] Steel > Wood > Water [B] Steel > Water > Wood [C] Water > Steel > Wood [D] Wood > Water > SteelAsked in ASCO 2014
  18. Which one among the following statements about thermal conductivity is correct? [A] Steel > Wood [B] Steel > Water [C] Water > Steel > Wood [D] Water > Wood > SteelAsked in HORTICULTURE DEVELOPMENT OF‐ FICER(HDO) 2015
  19. Which one among the following statements about thermal conductivity is correct? [A] Steel > Wood [B] Steel > Water [C] Water > Steel [D] Water > WoodAsked in POST GRADUATE TEACHER (PGT) 2018
  20. Which of the following gas has the highest thermal conductivity at the same temperature ?Asked in Management Officer (Rajya Sampati Vibhag) Exam 2023